I am going to make a wild guess here and say that every tennent has thier own telephone line. They have thier own telephones attached. If all they had was a cell phone that would be ok too. If I owned the apartment building I would buy a system like door king, centex etc that uses telco to interface. There would no internal wiring needed at each apartment. You would not have to worry about installing or replacing units in the apartments. Just that alone would more than offset the anual cost of a telco line. For a twenty unit biulding it would cost each tennant $1.50 per month if the phone bill was $30. Thats less than a cup of coffee and a donut per month. Thats a no brainer for me
David Lesher wrote:
So a friend lives in a ~16 suite condo. The existing door/intercom is junk. The apartment sets are as study as the old Soviet Union phones I saw in the Third World -- breath on them and they break.
So, replacement choices...
Most such systems use an outgoing line and a speeddialer. That's ~$270/year for the POTS line. With a 100 unit building, that's no sweat; with 16 it is.
Eons ago, there were systems that physicaly broke broke the called apt's T & R and rang with local ring/battery. Do they still exist?
I was thinking the better idea would be a KXTD816 or such with no CO lines attached. The advantage is, the subscriber sets are whatever the owner wants: Radios Hack, K-mart etc.
For the front door, I'd need one of the panel mounted speakerphone/speed dialers. I see them {"Hit #[apt no] to call; * to hang up"}.
What say the Brain Trust?
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